PTFE Chemical-Resistant Parts for Etching and Deposition Systems

Etching and thin-film deposition are the most critical and corrosive core processes in semiconductor manufacturing, determining the precision of chip circuit patterns and the uniformity of thin-film structures. These processes involve long-term use of strong corrosive chemical media, high-temperature plasma environments, and high-precision vacuum working conditions, which put forward ultra-high chemical resistance and structural stability requirements for equipment parts. Traditional equipment components made of metal, rubber, and ordinary plastic are easily corroded, decomposed, and damaged in etching and deposition environments, resulting in equipment failure, process pollution, and wafer defects. PTFE chemical-resistant parts, with absolute chemical inertness and extreme environmental adaptability, have become the exclusive supporting components for semiconductor etching and deposition systems PTFE SHEET.

Semiconductor etching systems include wet etching and dry plasma etching processes, both of which require equipment parts to withstand severe chemical erosion. Wet etching equipment uses high-concentration hydrofluoric acid, phosphoric acid, and mixed acid solutions to etch wafer surface structures, while dry etching adopts high-energy plasma and corrosive process gases for precision etching. PTFE chemical-resistant parts can resist corrosion of all etching media and plasma impact, without chemical decomposition, surface ablation, and structural damage. Different from rubber sealing parts that swell and fail after contacting corrosive liquids and metal parts that are oxidized and corroded by plasma, PTFE maintains stable structural integrity and surface cleanliness in long-term etching working environments, avoiding process pollution caused by component corrosion residue.

Thin-film deposition systems such as PVD, CVD, and ALD work in high-temperature, high-vacuum, and corrosive gas environments, requiring internal equipment parts to have high temperature resistance and anti-deposition pollution performance. PTFE chemical-resistant accessories have low surface energy and non-adhesive characteristics, which can effectively prevent thin-film material deposition and residue accumulation on the surface of equipment parts. Even after long-term deposition process operation, the surface of PTFE parts remains smooth and clean, which is convenient for equipment cleaning and maintenance, and avoids process parameter deviation caused by residual deposition layers. Diversified PTFE structural components, including corrosion-resistant PTFE TUBE gas delivery pipes, equipment lining sheets, and isolation gaskets, fully meet the component replacement and protection needs of etching and deposition systems.

In addition to excellent chemical resistance, PTFE parts have outstanding vacuum stability and temperature resistance suitable for etching and deposition equipment. They will not release volatile substances in high-vacuum environments, ensuring the vacuum degree stability of process chambers and avoiding vacuum pollution that affects etching and deposition accuracy. The wide temperature adaptation range of -200°C to 260°C enables PTFE components to adapt to high-temperature heating of deposition chambers and low-temperature cooling of etching systems, without thermal deformation and performance attenuation. At the same time, PTFE has excellent insulation and anti-plasma erosion performance, which can protect precision electrical components and structural parts of etching and deposition equipment from high-energy plasma damage.

Industrial application data shows that after adopting PTFE chemical-resistant parts, the failure rate of semiconductor etching and deposition equipment is reduced by more than 60%, and the process yield is significantly improved. The long-term stable working performance of PTFE components avoids frequent shutdown maintenance and part replacement, greatly improving the production efficiency of semiconductor production lines. With the continuous development of advanced semiconductor etching and deposition processes towards higher precision and stronger corrosion, PTFE chemical-resistant parts will continue to be the core anti-corrosion and anti-pollution solution for semiconductor process equipment.